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Home > Products > Discrete Semiconductor Products > Power Driver Modules

Alpha & Omega Semiconductor Inc. AIM704H50B

Name: AIM704H50B
Brand: Alpha & Omega Semiconductor Inc.
SKU: AIM704H50B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AIM704H50B

Manufacturer:: Alpha & Omega Semiconductor Inc.

Category:: Power Driver Modules

Package:: 28-SOIC (0.295", 7.50mm Width), 19 Leads

Datasheet:: AIM704H50B.pdf

Description:: 3-PHASE MOSFET IPM, 500V/2.4

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Product details

Overview

AIM704H50B from Alpha & Omega Semiconductor is a 3-phase intelligent power module (IPM) integrating six 600V αMOS2™ MOSFETs, high- and low-side HVIC gate drivers, bootstrap diodes with current-limiting resistors, UVLO, over-temperature monitoring (VOT), and 1500Vrms isolation. It delivers up to 2A continuous output per phase for AC 100–240Vrms fan motor drives.

For engineers reviewing the AIM704H50B datasheet, pinout, applications, or equivalent options, key selection considerations include its 2.4Ω max R_DS(on), 1.5µs minimum dead-time support, 16kHz max PWM frequency, integrated temperature sensing via VOT pin, and IPM-7 surface-mount package with 18×7.5mm footprint.

Technical Context

The AIM704H50B implements a fully integrated 3-phase inverter architecture with independent high-side (UH/VH/WH) and low-side (UL/VL/WL) logic inputs, each driving dedicated HVICs that manage level-shifting and gate drive for αMOS2™ power stages. Its control supply (VCC) and high-side bias (VB(U/V/W)) operate at 13.5–16.5V with separate UVLO thresholds (11.4V trip / 11.9V reset for VCC; 10.0V / 11.0V for VB).

Thermal protection relies on an internal LVIC sensor whose analog voltage output (VOT) scales linearly from 1.05V at 25°C to 2.78V at 90°C (±5°C accuracy), configurable via 10kΩ pull-down to disable OT shutdown while retaining monitoring. Isolation is rated at 1500Vrms/min between all pins and heatsink plate.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS Rating	600V @ T_J=150°C - Enables safe operation with 400V DC bus in AC 100–240Vrms systems.
R_DS(on)	2.4Ω (max) @ V_CC=V_BS=15V, I_D=1.25A - Defines conduction loss and thermal rise under rated load.
PWM Frequency	Up to 16kHz - Supports high-efficiency motor control without audible noise in fan applications.
Dead-Time Minimum	1.5µs - Prevents shoot-through during complementary switching of high- and low-side MOSFETs.
VOT Output Range	0.80–2.92V across 25–90°C - Provides linear, calibrated temperature feedback for MCU-based thermal management.
Isolation Voltage	1500Vrms/min - Meets reinforced insulation requirements for mains-connected motor drives.
Thermal Resistance	R_th(j-c) = 12.5°C/W - Enables accurate junction temperature estimation from case temperature measurement.

Pinout & Package

AIM704H50B uses the IPM-7 surface-mount package (18 × 7.5 × 2.5 mm), optimized for compact motor drive PCB layouts with isolated power and control domains.

Pin/Terminal	Circuit Role	Design Meaning
VB(U), VB(V), VB(W)	High-side bias supply terminals	Provide floating 15V gate drive for U/V/W upper-leg MOSFETs; require local bootstrap capacitors.
IN(UH), IN(VH), IN(WH)	High-side logic inputs	Schmitt-triggered (3–18V compatible), active-high signals controlling upper-leg switching.
IN(UL), IN(VL), IN(WL)	Low-side logic inputs	Schmitt-triggered, active-high signals controlling lower-leg switching; referenced to COM.
VOT	LVIC temperature monitor output	Analog voltage proportional to die temperature; open-drain configuration supports 10kΩ pull-down for monitoring-only mode.
P (pins 17 & 19), N (pin 13)	DC-link terminals	Accept 0–400V DC bus input; dual P pins reduce current density and improve thermal distribution.
U1/U2, V, W (pins 14, 18, 16, 15)	Phase outputs	U1/U2 are internally connected - external parallel routing improves current sharing and reduces EMI.
VCC, COM (pins 7, 12)	Control supply interface	VCC powers logic and drivers; COM is control ground - must be isolated from power ground except at single-point N1.

Key Features

Feature	Design Value
Integrated Bootstrap Diodes + Limiting Resistors	Eliminates need for external bootstrap diodes and current-limiting resistors, reducing BOM count and layout complexity.
Independent UVLO for VCC and VBS	Prevents erratic switching by disabling all MOSFETs when either control supply drops below safe threshold (11.4V or 10.0V).
VOT Pin with Dual-Mode Configuration	Supports both over-temperature shutdown (open) and precision temperature monitoring (10kΩ pull-down), enabling flexible system-level thermal strategies.
αMOS2™ Power MOSFET Technology	Delivers low R_DS(on) and reduced switching losses, improving efficiency and thermal performance in space-constrained fan drives.
1500Vrms Isolation	Enables direct integration into mains-referenced inverters without additional isolation components or creepage/clearance reinforcement.

Applications

Fan Motor Inverter	Small Appliance Motor Control
Use Scenario: Variable-speed control of shaded-pole or permanent-magnet synchronous motors in ceiling fans, exhaust fans, and HVAC blowers operating from AC 100–240Vrms. IC Role / Device Role / Timing Role: 3-phase inverter module providing gate drive, power switching, fault protection, and temperature telemetry for MCU-based motor control. Use Value: Reduces system component count by integrating drivers, MOSFETs, bootstrap circuitry, and thermal monitoring - enabling compact, cost-effective fan modules with <1.5W standby consumption.	Use Scenario: Speed-regulated motor drives in refrigerators, air purifiers, and dehumidifiers where EMI and thermal management are critical. IC Role / Device Role / Timing Role: Intelligent power stage executing PWM-driven 3-phase commutation with built-in UVLO, OT detection, and fast fault response (<1µs propagation delay). Use Value: Enables reliable operation at ambient temperatures up to 125°C case temperature while maintaining <2.4Ω R_DS(on) and <750ns t_OFF for efficient low-noise motor control.
BLDC Compressor Driver	Industrial Ventilation System
Use Scenario: Low-power brushless DC compressor drives in portable cooling units and mini-split systems requiring high reliability and low acoustic noise. IC Role / Device Role / Timing Role: Integrated inverter delivering precise phase timing, current limiting via shunt resistor interface, and real-time die temperature feedback via VOT pin. Use Value: Supports 16kHz PWM without audible whine and provides ±5°C temperature accuracy - enabling predictive thermal derating before reaching 130°C OT trip point.	Use Scenario: Compact, field-installable ventilation controllers for commercial buildings using AC mains input and requiring CE/UL safety compliance. IC Role / Device Role / Timing Role: Safety-certified power stage with 1500Vrms isolation, reinforced insulation, and dual UVLO protection for unattended long-term operation. Use Value: Eliminates need for external isolation transformers or optocouplers, reducing bill-of-materials and passing EN 60335-1 Annex G creepage requirements with standard PCB layout.

Fan Motor Inverter

Small Appliance Motor Control

Use Scenario: Variable-speed control of shaded-pole or permanent-magnet synchronous motors in ceiling fans, exhaust fans, and HVAC blowers operating from AC 100–240Vrms.

IC Role / Device Role / Timing Role: 3-phase inverter module providing gate drive, power switching, fault protection, and temperature telemetry for MCU-based motor control.

Use Value: Reduces system component count by integrating drivers, MOSFETs, bootstrap circuitry, and thermal monitoring - enabling compact, cost-effective fan modules with <1.5W standby consumption.

Use Scenario: Speed-regulated motor drives in refrigerators, air purifiers, and dehumidifiers where EMI and thermal management are critical.

IC Role / Device Role / Timing Role: Intelligent power stage executing PWM-driven 3-phase commutation with built-in UVLO, OT detection, and fast fault response (<1µs propagation delay).

Use Value: Enables reliable operation at ambient temperatures up to 125°C case temperature while maintaining <2.4Ω R_DS(on) and <750ns t_OFF for efficient low-noise motor control.

BLDC Compressor Driver

Industrial Ventilation System

Use Scenario: Low-power brushless DC compressor drives in portable cooling units and mini-split systems requiring high reliability and low acoustic noise.

IC Role / Device Role / Timing Role: Integrated inverter delivering precise phase timing, current limiting via shunt resistor interface, and real-time die temperature feedback via VOT pin.

Use Value: Supports 16kHz PWM without audible whine and provides ±5°C temperature accuracy - enabling predictive thermal derating before reaching 130°C OT trip point.

Use Scenario: Compact, field-installable ventilation controllers for commercial buildings using AC mains input and requiring CE/UL safety compliance.

IC Role / Device Role / Timing Role: Safety-certified power stage with 1500Vrms isolation, reinforced insulation, and dual UVLO protection for unattended long-term operation.

Use Value: Eliminates need for external isolation transformers or optocouplers, reducing bill-of-materials and passing EN 60335-1 Annex G creepage requirements with standard PCB layout.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-phase IPM motor drive applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
FSB50450	Higher R_DS(on) (3.5Ω), no integrated VOT output, requires external bootstrap diodes.	Lacks on-chip temperature telemetry; needs external ADC and thermal algorithm implementation.	Choose FSB50450 only if legacy design reuse or cost sensitivity outweighs need for integrated thermal monitoring.
IRSM836-054MA	Lower voltage rating (500V), smaller 12×7mm package, no dual-P-pin configuration.	Not rated for 400V DC bus; limited thermal margin in sustained 2A operation due to higher R_DS(on) (2.8Ω).	Select IRSM836-054MA only for space-constrained 230V-only applications where peak bus voltage remains ≤350V.

Compared with FSB50450 and IRSM836-054MA, the AIM704H50B uniquely combines 600V capability, integrated VOT-based thermal monitoring, dual-P-pin bus connection, and αMOS2™ low-loss technology - making it optimal for new-design AC 100–240Vrms fan and appliance inverters requiring compactness, reliability, and simplified thermal management.

Availability

AIM704H50B is available at Aetrix Electronics and suitable for fan motor inverters, small-appliance motor controls, and BLDC compressor drivers requiring stable component supply, long-lifecycle availability, and RoHS-compliant green packaging.

Supply support for AIM704H50B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, IGBTs, and intelligent power modules for consumer, industrial, and computing applications.

The AIM704H50B belongs to AOS's αMOS2™-based IPM product line, engineered specifically for compact, low-noise, and thermally robust 3-phase motor drives in AC-input appliances and ventilation systems.

FAQ

What is the maximum DC bus voltage supported by the AIM704H50B?

The AIM704H50B supports a recommended maximum DC bus voltage of 400V applied between pins P and N. Its MOSFETs are rated for 600V breakdown at T_J = 150°C, providing 50% voltage margin for transient spikes and ensuring robust operation in AC 100–240Vrms systems with rectified bus voltages up to 340V nominal. The AIM704H50B datasheet specifies 400V as the absolute maximum recommended operating voltage.

How does the VOT pin function in the AIM704H50B, and what external components are required?

The VOT pin outputs an analog voltage (0.80–2.92V) linearly proportional to internal LVIC temperature (25–90°C). When left open, it enables automatic over-temperature shutdown at 130°C. With a 10kΩ pull-down resistor to COM, it disables shutdown and provides continuous temperature monitoring only. For 3.3V MCUs, a clamp diode between VOT and V_CC is recommended to prevent overvoltage damage. The AIM704H50B requires no other external components for basic VOT operation.

Does the AIM704H50B include built-in bootstrap diodes, and how do they affect external design?

Yes, the AIM704H50B integrates bootstrap diodes with built-in current-limiting resistors for all three phases. This eliminates the need for external bootstrap diodes and discrete current-limiting resistors, simplifying layout, reducing component count, and minimizing parasitic inductance. External bootstrap capacitors (C1/C2) remain required, but their placement is less sensitive due to the integrated diode-resistor structure. The AIM704H50B's internal bootstrap design directly reduces bill-of-materials and improves reliability in high-volume fan motor applications.

What protection features are implemented in the AIM704H50B, and how are they triggered?

The AIM704H50B implements control-supply UVLO (VCC and VBS), over-temperature detection (via LVIC), and shoot-through prevention via 1.5µs minimum dead-time enforcement. UVLO disables all MOSFETs when VCC drops below 11.4V or VBS falls below 10.0V. OT protection turns off all low-side MOSFETs when die temperature exceeds 130°C (trip) and resets at 100°C (hysteresis = 30°C). These protections are hardware-based and fully autonomous - no MCU intervention is needed for activation. The AIM704H50B ensures fail-safe behavior under fault conditions without software dependency.

Can the AIM704H50B be used with a 3.3V microcontroller, and what interface considerations apply?

Yes, the AIM704H50B accepts 3–18V logic inputs with Schmitt-trigger receivers, making it fully compatible with 3.3V MCUs. Input threshold voltages are V_th(on) = 2.5V (max) and V_th(off) = 0.8V (min), ensuring reliable recognition of 3.3V logic levels. However, the VOT output (up to 2.92V) may exceed 3.3V MCU supply during high-temperature operation; a clamp diode between VOT and MCU V_CC is recommended. All control signals (INxH/INxL) and VCC must share the same isolated control ground (COM) - not power ground - to maintain noise immunity. The AIM704H50B supports direct 3.3V MCU interfacing with minimal external conditioning.

AIM704H50B Specifications

Product attributes: Attribute value

Manufacturer:: Alpha & Omega Semiconductor Inc.

Series:: -

Package/Case:: 28-SOIC (0.295", 7.50mm Width), 19 Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: MOSFET

Configuration:: 3 Phase Inverter

Current:: 2 A

Voltage:: 500 V

Voltage - Isolation:: 1500Vrms

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

AIM704H50B FAQ

1.How can I place an order for AIM704H50B through Aetrix?

Please submit a Request for Quotation (RFQ) for AIM704H50B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AIM704H50B reliable?

The price and inventory of AIM704H50B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AIM704H50B is usually 5 days.

3.What payment methods are accepted for AIM704H50B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AIM704H50B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AIM704H50B?

AIM704H50B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AIM704H50B order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AIM704H50B?

For technical support, including AIM704H50B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AIM704H50B requirements.

6.How does Aetrix verify that AIM704H50B is sourced from the original manufacturer or authorized distributors?

All AIM704H50B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AIM704H50B meets industry standards.

7.What is the process for return or replacement of AIM704H50B?

All AIM704H50B units undergo pre-shipment inspection (PSI). If there is an issue with AIM704H50B, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AIM704H50B part is unused and in its original packaging.

Return procedure for AIM704H50B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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